You are not familiar with what is unofficially called the Calvin Johnson rule? It was repeated and rehashed ad nauseum on CZ as well as the entire country for weeks - "catches that are made while going to the ground requires continuous possession". I agree that this was a catch as well, and that Dez had 3 feet down, an elbow, AND possession but this rule allows officials to interpret catches differently (which I am completely against) if going to the ground.
BUT even using this rule, Dez still made a football move. I completely disagree that an off field call could be reversed due to subjective interpretation of what characterizes not a football move, but "enough of a football move". It's a horrible rule.
As for the other refs who supported the reversal, google is your friend.